On Dec 30, 2011, at 2:15 PM, cdb wrote: > does anyone on the list know what type of sensor it=20 > might use to perform this feat? http://hackaday.com/2011/09/21/air-wick-odor-detect-teardown/ BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .